I browse with Firefox and 50% of the time, I am behind a proxy. The proxy firewall blocks certain sites including Facebook, Pinterest, and Twitter. I am unable to obtain a complete list of blocked sites and the list may grow daily.
These pop-ups are annoying and can be numerous. The pop-ups do not indicate which blocked site is causing the pop-up to appear.
I want to be able to load pages from these legitimate sites while simultaneously blocking or otherwise redirecting / intercepting the calls made from the browser to the blocked sites so requests to the blocked sites are not made at all, or at least directed to a harmless (localhost?), yet invalid site. I am not looking to circumvent the blocking mechanism; I am looking to prevent the calls from a browsed unblocked page to embed from blocked sites.
I am not sure where to start. Online searches against what I'm looking for have failed (granted, maybe I'm not using the correct terminology), and I've tried altering the hosts file to direct certain sites to 127.0.0.1, but that does not appear to be working (it is possible I am not listing all the proper sites).
Are there any FireFox plug-ins or other recommendations to do this?
Without having to scrounge through the source of the loaded page,
- where do I look to obtain a list of the sites a webpage I've browsed to is trying to embed/call? I cannot obtain this list from the pop-up and having the list might solve the majority of my problems.
- how do I prevent these blocked sites from being embedded by the page I'm calling, or otherwise intercept the calls to the blocked sites? Suggestions for Firefox plug-ins and how to configure them appropriately or other alterations are appreciated.
- preferably a way to easily enable and disable this functionality on demand.